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# NumberFormat

`public abstract class NumberFormat`
`` `` `extends UFormat` ``

java.lang.Object
↳ | java.text.Format
| ↳ | android.icu.text.UFormat
|  | ↳ | android.icu.text.NumberFormat

Known direct subclasses DecimalFormat
DecimalFormat | [icu enhancement] ICU's replacement for `DecimalFormat`. Methods, fields, and other functionality specific to ICU are labeled '[icu]'.

Known indirect subclasses CompactDecimalFormat
CompactDecimalFormat | Formats numbers in compact (abbreviated) notation, like "1.2K" instead of "1200".

[icu enhancement] ICU's replacement for `NumberFormat`. Methods, fields, and other functionality specific to ICU are labeled '[icu]'.

IMPORTANT: New users are strongly encouraged to see if `NumberFormatter` fits their use case. Although not deprecated, this class, NumberFormat, is only provided for java.text.NumberFormat compatibility.

`NumberFormat` is the abstract base class for all number formats. This class provides the interface for formatting and parsing numbers. `NumberFormat` also provides methods for determining which locales have number formats, and what their names are. `NumberFormat` helps you to format and parse numbers for any locale. Your code can be completely independent of the locale conventions for decimal points, thousands-separators, or even the particular decimal digits used, or whether the number format is even decimal.

To format a number for the current Locale, use one of the factory class methods:

>       myString = NumberFormat.getInstance().format(myNumber);

If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.

>      NumberFormat nf = NumberFormat.getInstance();
>      for (int i = 0; i < a.length; ++i) {
>          output.println(nf.format(myNumber[i]) + "; ");
>      }

To format a number for a different Locale, specify it in the call to `getInstance`.

>      NumberFormat nf = NumberFormat.getInstance(Locale.FRENCH);

You can also use a `NumberFormat` to parse numbers:

>      myNumber = nf.parse(myString);

Use `getInstance` or `getNumberInstance` to get the normal number format. Use `getIntegerInstance` to get an integer number format. Use `getCurrencyInstance` to get the currency number format. And use `getPercentInstance` to get a format for displaying percentages. Some factory methods are found within subclasses of NumberFormat. With this format, a fraction like 0.53 is displayed as 53%.

Starting from ICU 4.2, you can use getInstance() by passing in a 'style' as parameter to get the correct instance. For example, use getInstance(...NUMBERSTYLE) to get the normal number format, getInstance(...PERCENTSTYLE) to get a format for displaying percentage, getInstance(...SCIENTIFICSTYLE) to get a format for displaying scientific number, getInstance(...INTEGERSTYLE) to get an integer number format, getInstance(...CURRENCYSTYLE) to get the currency number format, in which the currency is represented by its symbol, for example, "$3.00". getInstance(...ISOCURRENCYSTYLE) to get the currency number format, in which the currency is represented by its ISO code, for example "USD3.00". getInstance(...PLURALCURRENCYSTYLE) to get the currency number format, in which the currency is represented by its full name in plural format, for example, "3.00 US dollars" or "1.00 US dollar".

You can also control the display of numbers with such methods as `setMinimumFractionDigits`. If you want even more control over the format or parsing, or want to give your users more control, you can try casting the `NumberFormat` you get from the factory methods to a `DecimalFormat`. This will work for the vast majority of locales; just remember to put it in a `try` block in case you encounter an unusual one.

NumberFormat is designed such that some controls work for formatting and others work for parsing. The following is the detailed description for each these control methods,

setParseIntegerOnly : only affects parsing, e.g. if true, "3456.78" -> 3456 (and leaves the parse position just after '6') if false, "3456.78" -> 3456.78 (and leaves the parse position just after '8') This is independent of formatting. If you want to not show a decimal point where there might be no digits after the decimal point, use setDecimalSeparatorAlwaysShown on DecimalFormat.

You can also use forms of the `parse` and `format` methods with `ParsePosition` and `FieldPosition` to allow you to:

- progressively parse through pieces of a string
- align the decimal point and other areas

For example, you can align numbers in two ways:

1. If you are using a monospaced font with spacing for alignment, you can pass the `FieldPosition` in your format call, with `field` = `INTEGER_FIELD`. On output, `getEndIndex` will be set to the offset between the last character of the integer and the decimal. Add (desiredSpaceCount - getEndIndex) spaces at the front of the string.
2. If you are using proportional fonts, instead of padding with spaces, measure the width of the string in pixels from the start to `getEndIndex`. Then move the pen by (desiredPixelWidth - widthToAlignmentPoint) before drawing the text. It also works where there is no decimal, but possibly additional characters at the end, e.g., with parentheses in negative numbers: "(12)" for -12.

### Synchronization

Number formats are generally not synchronized. It is recommended to create separate format instances for each thread. If multiple threads access a format concurrently, it must be synchronized externally.

#### DecimalFormat

DecimalFormat is the concrete implementation of NumberFormat, and the NumberFormat API is essentially an abstraction from DecimalFormat's API. Refer to DecimalFormat for more information about this API.

see DecimalFormat see java.text.ChoiceFormat

## Summary

### Nested classes
`class` | `NumberFormat.Field` The instances of this inner class are used as attribute keys and values in AttributedCharacterIterator that NumberFormat.formatToCharacterIterator() method returns.

### Constants
`int` | `ACCOUNTINGCURRENCYSTYLE` [icu] Constant to specify currency style of format which uses currency symbol to represent currency for accounting, for example: "($3.00), instead of "-$3.00" (`CURRENCYSTYLE`).
`int` | `CASHCURRENCYSTYLE` [icu] Constant to specify currency cash style of format which uses currency ISO code to represent currency, for example: "NT$3" instead of "NT$3.23".
`int` | `CURRENCYSTYLE` [icu] Constant to specify general currency style of format.
`int` | `FRACTION_FIELD` Field constant used to construct a FieldPosition object.
`int` | `INTEGERSTYLE` [icu] Constant to specify a integer number style format.
`int` | `INTEGER_FIELD` Field constant used to construct a FieldPosition object.
`int` | `ISOCURRENCYSTYLE` [icu] Constant to specify currency style of format which uses currency ISO code to represent currency, for example: "USD3.00".
`int` | `NUMBERSTYLE` [icu] Constant to specify normal number style of format.
`int` | `PERCENTSTYLE` [icu] Constant to specify a style of format to display percent.
`int` | `PLURALCURRENCYSTYLE` [icu] Constant to specify currency style of format which uses currency long name with plural format to represent currency, for example, "3.00 US Dollars".
`int` | `SCIENTIFICSTYLE` [icu] Constant to specify a style of format to display scientific number.
`int` | `STANDARDCURRENCYSTYLE` [icu] Constant to specify currency style of format which uses currency symbol to represent currency, for example "$3.00", using non-accounting style for negative values (e.g.

### Public constructors
`NumberFormat()` Empty constructor.

### Public methods
`Object` | `clone()` Overrides clone.
`boolean` | `equals(Object obj)` Overrides equals.
`abstract StringBuffer` | `format(BigInteger number, StringBuffer toAppendTo, FieldPosition pos)` [icu] Formats a BigInteger.
`abstract StringBuffer` | `format(BigDecimal number, StringBuffer toAppendTo, FieldPosition pos)` [icu] Formats an ICU BigDecimal.
`StringBuffer` | `format(Object number, StringBuffer toAppendTo, FieldPosition pos)` Formats a number and appends the resulting text to the given string buffer.
`final String` | `format(BigDecimal number)` Convenience method to format a BigDecimal.
`abstract StringBuffer` | `format(double number, StringBuffer toAppendTo, FieldPosition pos)` Specialization of format.
`final String` | `format(BigInteger number)` [icu] Convenience method to format a BigInteger.
`abstract StringBuffer` | `format(BigDecimal number, StringBuffer toAppendTo, FieldPosition pos)` [icu] Formats a BigDecimal.
`final String` | `format(BigDecimal number)` [icu] Convenience method to format an ICU BigDecimal.
`final String` | `format(double number)` Specialization of format.
`final String` | `format(long number)` Specialization of format.
`StringBuffer` | `format(CurrencyAmount currAmt, StringBuffer toAppendTo, FieldPosition pos)` [icu] Formats a CurrencyAmount.
`final String` | `format(CurrencyAmount currAmt)` [icu] Convenience method to format a CurrencyAmount.
`abstract StringBuffer` | `format(long number, StringBuffer toAppendTo, FieldPosition pos)` Specialization of format.
`static Locale[]` | `getAvailableLocales()` Returns the list of Locales for which NumberFormats are available.
`DisplayContext` | `getContext(DisplayContext.Type type)` [icu] Get the formatter's DisplayContext value for the specified DisplayContext.Type, such as CAPITALIZATION.
`Currency` | `getCurrency()` Returns the `Currency` object used to display currency amounts.
`static NumberFormat` | `getCurrencyInstance(Locale inLocale)` Returns a currency format for the specified locale.
`static NumberFormat` | `getCurrencyInstance(ULocale inLocale)` [icu] Returns a currency format for the specified locale.
`static final NumberFormat` | `getCurrencyInstance()` Returns a currency format for the current default `FORMAT` locale.
`static final NumberFormat` | `getInstance()` Returns the default number format for the current default `FORMAT` locale.
`static NumberFormat` | `getInstance(Locale inLocale)` Returns the default number format for the specified locale.
`static NumberFormat` | `getInstance(ULocale desiredLocale, int choice)` Returns a specific style number format for a specific locale.
`static NumberFormat` | `getInstance(Locale inLocale, int style)` [icu] Returns a specific style number format for a specific locale.
`static NumberFormat` | `getInstance(ULocale inLocale)` [icu] Returns the default number format for the specified locale.
`static final NumberFormat` | `getInstance(int style)` [icu] Returns a specific style number format for default `FORMAT` locale.
`static NumberFormat` | `getIntegerInstance(ULocale inLocale)` [icu] Returns an integer number format for the specified locale.
`static final NumberFormat` | `getIntegerInstance()` Returns an integer number format for the current default `FORMAT` locale.
`static NumberFormat` | `getIntegerInstance(Locale inLocale)` Returns an integer number format for the specified locale.
`int` | `getMaximumFractionDigits()` Returns the maximum number of digits allowed in the fraction portion of a number.
`int` | `getMaximumIntegerDigits()` Returns the maximum number of digits allowed in the integer portion of a number.
`int` | `getMinimumFractionDigits()` Returns the minimum number of digits allowed in the fraction portion of a number.
`int` | `getMinimumIntegerDigits()` Returns the minimum number of digits allowed in the integer portion of a number.
`static NumberFormat` | `getNumberInstance(ULocale inLocale)` [icu] Returns a general-purpose number format for the specified locale.
`static final NumberFormat` | `getNumberInstance()` Returns a general-purpose number format for the current default `FORMAT` locale.
`static NumberFormat` | `getNumberInstance(Locale inLocale)` Returns a general-purpose number format for the specified locale.
`static final NumberFormat` | `getPercentInstance()` Returns a percentage format for the current default `FORMAT` locale.
`static NumberFormat` | `getPercentInstance(Locale inLocale)` Returns a percentage format for the specified locale.
`static NumberFormat` | `getPercentInstance(ULocale inLocale)` [icu] Returns a percentage format for the specified locale.
`int` | `getRoundingMode()` Returns the rounding mode used in this NumberFormat.
`static NumberFormat` | `getScientificInstance(ULocale inLocale)` [icu] Returns a scientific format for the specified locale.
`static NumberFormat` | `getScientificInstance(Locale inLocale)` [icu] Returns a scientific format for the specified locale.
`static final NumberFormat` | `getScientificInstance()` [icu] Returns a scientific format for the current default `FORMAT` locale.
`int` | `hashCode()` Returns a hash code value for the object.
`boolean` | `isGroupingUsed()` Returns true if grouping is used in this format.
`boolean` | `isParseIntegerOnly()` Returns true if this format will parse numbers as integers only.
`boolean` | `isParseStrict()` [icu] Returns whether strict parsing is in effect.
`Number` | `parse(String text)` Parses text from the beginning of the given string to produce a number.
`abstract Number` | `parse(String text, ParsePosition parsePosition)` Returns a Long if possible (e.g., within the range [Long.MIN_VALUE, Long.MAX_VALUE] and with no decimals); otherwise, returns another type, such as a BigDecimal, BigInteger, or Double.
`CurrencyAmount` | `parseCurrency(CharSequence text, ParsePosition pos)` Parses text from the given string as a CurrencyAmount.
`final Object` | `parseObject(String source, ParsePosition parsePosition)` Parses text from a string to produce a number.
`void` | `setContext(DisplayContext context)` [icu] Set a particular DisplayContext value in the formatter, such as CAPITALIZATION_FOR_STANDALONE.
`void` | `setCurrency(Currency theCurrency)` Sets the `Currency` object used to display currency amounts.
`void` | `setGroupingUsed(boolean newValue)` Sets whether or not grouping will be used in this format.
`void` | `setMaximumFractionDigits(int newValue)` Sets the maximum number of digits allowed in the fraction portion of a number.
`void` | `setMaximumIntegerDigits(int newValue)` Sets the maximum number of digits allowed in the integer portion of a number.
`void` | `setMinimumFractionDigits(int newValue)` Sets the minimum number of digits allowed in the fraction portion of a number.
`void` | `setMinimumIntegerDigits(int newValue)` Sets the minimum number of digits allowed in the integer portion of a number.
`void` | `setParseIntegerOnly(boolean value)` Sets whether to ignore the fraction part of a number when parsing (defaults to false).
`void` | `setParseStrict(boolean value)` [icu] Sets whether strict parsing is in effect.
`void` | `setRoundingMode(int roundingMode)` Set the rounding mode used in this NumberFormat.

### Protected methods
`static String` | `getPattern(ULocale forLocale, int choice)` Returns the pattern for the provided locale and choice.

### Inherited methods
From class `java.text.Format`
`Object` | `clone()` Creates and returns a copy of this object.
`final String` | `format(Object obj)` Formats an object to produce a string.
`abstract StringBuffer` | `format(Object obj, StringBuffer toAppendTo, FieldPosition pos)` Formats an object and appends the resulting text to a given string buffer.
`AttributedCharacterIterator` | `formatToCharacterIterator(Object obj)` Formats an Object producing an `AttributedCharacterIterator`.
`Object` | `parseObject(String source)` Parses text from the beginning of the given string to produce an object.
`abstract Object` | `parseObject(String source, ParsePosition pos)` Parses text from a string to produce an object.
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Constants

### ACCOUNTINGCURRENCYSTYLE

    public static final int ACCOUNTINGCURRENCYSTYLE

[icu] Constant to specify currency style of format which uses currency symbol to represent currency for accounting, for example: "($3.00), instead of "-$3.00" (`CURRENCYSTYLE`). Overrides any style specified using -cf- key in locale.

Constant Value: 7 (0x00000007)

### CASHCURRENCYSTYLE

    public static final int CASHCURRENCYSTYLE

[icu] Constant to specify currency cash style of format which uses currency ISO code to represent currency, for example: "NT$3" instead of "NT$3.23".

Constant Value: 8 (0x00000008)

### CURRENCYSTYLE

    public static final int CURRENCYSTYLE

[icu] Constant to specify general currency style of format. Defaults to STANDARDCURRENCYSTYLE, using currency symbol, for example "$3.00", with non-accounting style for negative values (e.g. minus sign). The specific style may be specified using the -cf- locale key.

Constant Value: 1 (0x00000001)

### FRACTION_FIELD

    public static final int FRACTION_FIELD

Field constant used to construct a FieldPosition object. Signifies that the position of the fraction part of a formatted number should be returned.

See also:

- `FieldPosition`

Constant Value: 1 (0x00000001)

### INTEGERSTYLE

    public static final int INTEGERSTYLE

[icu] Constant to specify a integer number style format.

Constant Value: 4 (0x00000004)

### INTEGER_FIELD

    public static final int INTEGER_FIELD

Field constant used to construct a FieldPosition object. Signifies that the position of the integer part of a formatted number should be returned.

See also:

- `FieldPosition`

Constant Value: 0 (0x00000000)

### ISOCURRENCYSTYLE

    public static final int ISOCURRENCYSTYLE

[icu] Constant to specify currency style of format which uses currency ISO code to represent currency, for example: "USD3.00".

Constant Value: 5 (0x00000005)

### NUMBERSTYLE

    public static final int NUMBERSTYLE

[icu] Constant to specify normal number style of format.

Constant Value: 0 (0x00000000)

### PERCENTSTYLE

    public static final int PERCENTSTYLE

[icu] Constant to specify a style of format to display percent.

Constant Value: 2 (0x00000002)

### PLURALCURRENCYSTYLE

    public static final int PLURALCURRENCYSTYLE

[icu] Constant to specify currency style of format which uses currency long name with plural format to represent currency, for example, "3.00 US Dollars".

Constant Value: 6 (0x00000006)

### SCIENTIFICSTYLE

    public static final int SCIENTIFICSTYLE

[icu] Constant to specify a style of format to display scientific number.

Constant Value: 3 (0x00000003)

### STANDARDCURRENCYSTYLE

    public static final int STANDARDCURRENCYSTYLE

[icu] Constant to specify currency style of format which uses currency symbol to represent currency, for example "$3.00", using non-accounting style for negative values (e.g. minus sign). Overrides any style specified using -cf- key in locale.

Constant Value: 9 (0x00000009)

## Public constructors

### NumberFormat

    public NumberFormat ()

Empty constructor. Public for API compatibility with historic versions of `NumberFormat` which had public constructor even though this is an abstract class.

## Public methods

### clone

    public Object clone ()

Overrides clone.

Returns
`Object` | a clone of this instance.

### equals

    public boolean equals (Object obj)

Overrides equals. Two NumberFormats are equal they are of the same class and the user-specified values for settings (groupingUsed, parseIntegerOnly, maximumIntegerDigits, etc.) are equal.

Parameters
`obj` | `Object`: the object to compare against

Returns
`boolean` | true if the object is equal to this.

### format

    public abstract StringBuffer format (BigInteger number,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

[icu] Formats a BigInteger. Specialization of format.

Parameters
`number` | `BigInteger`
`toAppendTo` | `StringBuffer`
`pos` | `FieldPosition`

Returns
`StringBuffer` |

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### format

    public abstract StringBuffer format (BigDecimal number,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

[icu] Formats an ICU BigDecimal. Specialization of format.

Parameters
`number` | `BigDecimal`
`toAppendTo` | `StringBuffer`
`pos` | `FieldPosition`

Returns
`StringBuffer` |

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### format

    public StringBuffer format (Object number,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

Formats a number and appends the resulting text to the given string buffer. [icu] Note: recognizes `BigInteger` and `BigDecimal` objects.

Parameters
`number` | `Object`: The object to format
`toAppendTo` | `StringBuffer`: where the text is to be appended
`pos` | `FieldPosition`: A `FieldPosition` identifying a field in the formatted text

Returns
`StringBuffer` | the string buffer passed in as `toAppendTo`, with formatted text appended

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### format

    public final String format (BigDecimal number)

Convenience method to format a BigDecimal.

Parameters
`number` | `BigDecimal`

Returns
`String` |

### format

    public abstract StringBuffer format (double number,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

Specialization of format.

Parameters
`number` | `double`
`toAppendTo` | `StringBuffer`
`pos` | `FieldPosition`

Returns
`StringBuffer` |

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### format

    public final String format (BigInteger number)

[icu] Convenience method to format a BigInteger.

Parameters
`number` | `BigInteger`

Returns
`String` |

### format

    public abstract StringBuffer format (BigDecimal number,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

[icu] Formats a BigDecimal. Specialization of format.

Parameters
`number` | `BigDecimal`
`toAppendTo` | `StringBuffer`
`pos` | `FieldPosition`

Returns
`StringBuffer` |

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### format

    public final String format (BigDecimal number)

[icu] Convenience method to format an ICU BigDecimal.

Parameters
`number` | `BigDecimal`

Returns
`String` |

### format

    public final String format (double number)

Specialization of format.

Parameters
`number` | `double`

Returns
`String` |

See also:

- `Format.format(Object)`

### format

    public final String format (long number)

Specialization of format.

Parameters
`number` | `long`

Returns
`String` |

See also:

- `Format.format(Object)`

### format

    public StringBuffer format (CurrencyAmount currAmt,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

[icu] Formats a CurrencyAmount. Specialization of format.

Parameters
`currAmt` | `CurrencyAmount`
`toAppendTo` | `StringBuffer`
`pos` | `FieldPosition`

Returns
`StringBuffer` |

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### format

    public final String format (CurrencyAmount currAmt)

[icu] Convenience method to format a CurrencyAmount.

Parameters
`currAmt` | `CurrencyAmount`

Returns
`String` |

### format

    public abstract StringBuffer format (long number,
                    StringBuffer toAppendTo,
                    FieldPosition pos)

Specialization of format.

Parameters
`number` | `long`
`toAppendTo` | `StringBuffer`
`pos` | `FieldPosition`

Returns
`StringBuffer` |

See also:

- `Format.format(Object, StringBuffer, FieldPosition)`

### getAvailableLocales

    public static Locale[] getAvailableLocales ()

Returns the list of Locales for which NumberFormats are available.

Returns
`Locale[]` | the available locales

### getContext

    public DisplayContext getContext (DisplayContext.Type type)

[icu] Get the formatter's DisplayContext value for the specified DisplayContext.Type, such as CAPITALIZATION.

Parameters
`type` | `DisplayContext.Type`: the DisplayContext.Type whose value to return

Returns
`DisplayContext` | the current DisplayContext setting for the specified type

### getCurrency

    public Currency getCurrency ()

Returns the `Currency` object used to display currency amounts. This may be null.

Returns
`Currency` |

### getCurrencyInstance

    public static NumberFormat getCurrencyInstance (Locale inLocale)

Returns a currency format for the specified locale.

Parameters
`inLocale` | `Locale`

Returns
`NumberFormat` | a number format for currency

### getCurrencyInstance

    public static NumberFormat getCurrencyInstance (ULocale inLocale)

[icu] Returns a currency format for the specified locale.

Parameters
`inLocale` | `ULocale`

Returns
`NumberFormat` | a number format for currency

### getCurrencyInstance

    public static final NumberFormat getCurrencyInstance ()

Returns a currency format for the current default `FORMAT` locale.

Returns
`NumberFormat` | a number format for currency

See also:

- `ULocale.Category.FORMAT`

### getInstance

    public static final NumberFormat getInstance ()

Returns the default number format for the current default `FORMAT` locale. The default format is one of the styles provided by the other factory methods: getNumberInstance, getIntegerInstance, getCurrencyInstance or getPercentInstance. Exactly which one is locale-dependent.

Returns
`NumberFormat` |

See also:

- `ULocale.Category.FORMAT`

### getInstance

    public static NumberFormat getInstance (Locale inLocale)

Returns the default number format for the specified locale. The default format is one of the styles provided by the other factory methods: getNumberInstance, getCurrencyInstance or getPercentInstance. Exactly which one is locale-dependent.

Parameters
`inLocale` | `Locale`

Returns
`NumberFormat` |

### getInstance

    public static NumberFormat getInstance (ULocale desiredLocale,
                    int choice)

Returns a specific style number format for a specific locale.

Parameters
`desiredLocale` | `ULocale`: the specific locale.
`choice` | `int`: number format style

Returns
`NumberFormat` |

Throws
`IllegalArgumentException` | if choice is not one of NUMBERSTYLE, CURRENCYSTYLE, PERCENTSTYLE, SCIENTIFICSTYLE, INTEGERSTYLE, ISOCURRENCYSTYLE, PLURALCURRENCYSTYLE, ACCOUNTINGCURRENCYSTYLE. CASHCURRENCYSTYLE, STANDARDCURRENCYSTYLE.

### getInstance

    public static NumberFormat getInstance (Locale inLocale,
                    int style)

[icu] Returns a specific style number format for a specific locale.

Parameters
`inLocale` | `Locale`: the specific locale.
`style` | `int`: number format style

Returns
`NumberFormat` |

### getInstance

    public static NumberFormat getInstance (ULocale inLocale)

[icu] Returns the default number format for the specified locale. The default format is one of the styles provided by the other factory methods: getNumberInstance, getCurrencyInstance or getPercentInstance. Exactly which one is locale-dependent.

Parameters
`inLocale` | `ULocale`

Returns
`NumberFormat` |

### getInstance

    public static final NumberFormat getInstance (int style)

[icu] Returns a specific style number format for default `FORMAT` locale.

Parameters
`style` | `int`: number format style

Returns
`NumberFormat` |

See also:

- `ULocale.Category.FORMAT`

### getIntegerInstance

    public static NumberFormat getIntegerInstance (ULocale inLocale)

[icu] Returns an integer number format for the specified locale. The returned number format is configured to round floating point numbers to the nearest integer using IEEE half-even rounding (see `ROUND_HALF_EVEN`) for formatting, and to parse only the integer part of an input string (see `isParseIntegerOnly`).

Parameters
`inLocale` | `ULocale`: the locale for which a number format is needed

Returns
`NumberFormat` | a number format for integer values

### getIntegerInstance

    public static final NumberFormat getIntegerInstance ()

Returns an integer number format for the current default `FORMAT` locale. The returned number format is configured to round floating point numbers to the nearest integer using IEEE half-even rounding (see `ROUND_HALF_EVEN`) for formatting, and to parse only the integer part of an input string (see `isParseIntegerOnly`).

Returns
`NumberFormat` | a number format for integer values

See also:

- `ULocale.Category.FORMAT`

### getIntegerInstance

    public static NumberFormat getIntegerInstance (Locale inLocale)

Returns an integer number format for the specified locale. The returned number format is configured to round floating point numbers to the nearest integer using IEEE half-even rounding (see `ROUND_HALF_EVEN`) for formatting, and to parse only the integer part of an input string (see `isParseIntegerOnly`).

Parameters
`inLocale` | `Locale`: the locale for which a number format is needed

Returns
`NumberFormat` | a number format for integer values

### getMaximumFractionDigits

    public int getMaximumFractionDigits ()

Returns the maximum number of digits allowed in the fraction portion of a number. The default value is 3, which subclasses can override. When formatting, the exact behavior when this value is exceeded is subclass-specific. When parsing, this has no effect.

Returns
`int` | the maximum number of fraction digits

See also:

- `setMaximumFractionDigits(int)`

### getMaximumIntegerDigits

    public int getMaximumIntegerDigits ()

Returns the maximum number of digits allowed in the integer portion of a number. The default value is 40, which subclasses can override. When formatting, if the number of digits exceeds this value, the highest- significance digits are truncated until the limit is reached, in accordance with UTS#35. This setting has no effect on parsing.

Returns
`int` | the maximum number of integer digits

See also:

- `setMaximumIntegerDigits(int)`

### getMinimumFractionDigits

    public int getMinimumFractionDigits ()

Returns the minimum number of digits allowed in the fraction portion of a number. The default value is 0, which subclasses can override. When formatting, if this value is not reached, numbers are padded on the right with the locale-specific '0' character to ensure at least this number of fraction digits. When parsing, this has no effect.

Returns
`int` | the minimum number of fraction digits

See also:

- `setMinimumFractionDigits(int)`

### getMinimumIntegerDigits

    public int getMinimumIntegerDigits ()

Returns the minimum number of digits allowed in the integer portion of a number. The default value is 1, which subclasses can override. When formatting, if this value is not reached, numbers are padded on the left with the locale-specific '0' character to ensure at least this number of integer digits. When parsing, this has no effect.

Returns
`int` | the minimum number of integer digits

See also:

- `setMinimumIntegerDigits(int)`

### getNumberInstance

    public static NumberFormat getNumberInstance (ULocale inLocale)

[icu] Returns a general-purpose number format for the specified locale.

Parameters
`inLocale` | `ULocale`

Returns
`NumberFormat` |

### getNumberInstance

    public static final NumberFormat getNumberInstance ()

Returns a general-purpose number format for the current default `FORMAT` locale.

Returns
`NumberFormat` |

See also:

- `ULocale.Category.FORMAT`

### getNumberInstance

    public static NumberFormat getNumberInstance (Locale inLocale)

Returns a general-purpose number format for the specified locale.

Parameters
`inLocale` | `Locale`

Returns
`NumberFormat` |

### getPercentInstance

    public static final NumberFormat getPercentInstance ()

Returns a percentage format for the current default `FORMAT` locale.

Returns
`NumberFormat` | a number format for percents

See also:

- `ULocale.Category.FORMAT`

### getPercentInstance

    public static NumberFormat getPercentInstance (Locale inLocale)

Returns a percentage format for the specified locale.

Parameters
`inLocale` | `Locale`

Returns
`NumberFormat` | a number format for percents

### getPercentInstance

    public static NumberFormat getPercentInstance (ULocale inLocale)

[icu] Returns a percentage format for the specified locale.

Parameters
`inLocale` | `ULocale`

Returns
`NumberFormat` | a number format for percents

### getRoundingMode

    public int getRoundingMode ()

Returns the rounding mode used in this NumberFormat. The default implementation of tis method in NumberFormat always throws `UnsupportedOperationException`.

Returns
`int` | A rounding mode, between `BigDecimal.ROUND_UP` and `BigDecimal.ROUND_UNNECESSARY`.

See also:

- `setRoundingMode(int)`

### getScientificInstance

    public static NumberFormat getScientificInstance (ULocale inLocale)

[icu] Returns a scientific format for the specified locale.

Parameters
`inLocale` | `ULocale`

Returns
`NumberFormat` | a scientific number format

### getScientificInstance

    public static NumberFormat getScientificInstance (Locale inLocale)

[icu] Returns a scientific format for the specified locale.

Parameters
`inLocale` | `Locale`

Returns
`NumberFormat` | a scientific number format

### getScientificInstance

    public static final NumberFormat getScientificInstance ()

[icu] Returns a scientific format for the current default `FORMAT` locale.

Returns
`NumberFormat` | a scientific number format

See also:

- `ULocale.Category.FORMAT`

### hashCode

    public int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by `HashMap`.

The general contract of `hashCode` is:

- Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
- If two objects are equal according to the `equals(Object)` method, then calling the `hashCode` method on each of the two objects must produce the same integer result.
- It is not required that if two objects are unequal according to the `equals(java.lang.Object)` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class `Object` does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Returns
`int` | a hash code value for this object.

### isGroupingUsed

    public boolean isGroupingUsed ()

Returns true if grouping is used in this format. For example, in the en_US locale, with grouping on, the number 1234567 will be formatted as "1,234,567". The grouping separator as well as the size of each group is locale-dependent and is determined by subclasses of NumberFormat. Grouping affects both parsing and formatting.

Returns
`boolean` | true if grouping is used

See also:

- `setGroupingUsed(boolean)`

### isParseIntegerOnly

    public boolean isParseIntegerOnly ()

Returns true if this format will parse numbers as integers only. For example in the English locale, with ParseIntegerOnly true, the string "1234." would be parsed as the integer value 1234 and parsing would stop at the "." character. The decimal separator accepted by the parse operation is locale-dependent and determined by the subclass.

Returns
`boolean` | true if this will parse integers only

### isParseStrict

    public boolean isParseStrict ()

[icu] Returns whether strict parsing is in effect.

Returns
`boolean` | true if strict parsing is in effect

See also:

- `setParseStrict(boolean)`

### parse

    public Number parse (String text)

Parses text from the beginning of the given string to produce a number. The method might not use the entire text of the given string.

Parameters
`text` | `String`: A String whose beginning should be parsed.

Returns
`Number` | A Number parsed from the string.

Throws
`ParseException` | if the beginning of the specified string cannot be parsed.

See also:

- `format(BigDecimal)`

### parse

    public abstract Number parse (String text,
                    ParsePosition parsePosition)

Returns a Long if possible (e.g., within the range [Long.MIN_VALUE, Long.MAX_VALUE] and with no decimals); otherwise, returns another type, such as a BigDecimal, BigInteger, or Double. The return type is not guaranteed other than for the Long case.

If IntegerOnly is set, will stop at a decimal point (or equivalent; e.g., for rational numbers "1 2/3", will stop after the 1).

Does not throw an exception; if no object can be parsed, index is unchanged!

For more detail on parsing, see the "Parsing" header in the class documentation of `DecimalFormat`.

Parameters
`text` | `String`
`parsePosition` | `ParsePosition`

Returns
`Number` |

See also:

- `isParseIntegerOnly()`
- `DecimalFormat.setParseBigDecimal(boolean)`
- `Format.parseObject(String, ParsePosition)`

### parseCurrency

    public CurrencyAmount parseCurrency (CharSequence text,
                    ParsePosition pos)

Parses text from the given string as a CurrencyAmount. Unlike the parse() method, this method will attempt to parse a generic currency name, searching for a match of this object's locale's currency display names, or for a 3-letter ISO currency code. This method will fail if this format is not a currency format, that is, if it does not contain the currency pattern symbol (U+00A4) in its prefix or suffix.

Parameters
`text` | `CharSequence`: the text to parse
`pos` | `ParsePosition`: input-output position; on input, the position within text to match; must have 0 <= pos.getIndex() < text.length(); on output, the position after the last matched character. If the parse fails, the position in unchanged upon output.

Returns
`CurrencyAmount` | a CurrencyAmount, or null upon failure

### parseObject

    public final Object parseObject (String source,
                    ParsePosition parsePosition)

Parses text from a string to produce a number.

Parameters
`source` | `String`: the String to parse
`parsePosition` | `ParsePosition`: the position at which to start the parse

Returns
`Object` | the parsed number, or null

See also:

- `NumberFormat.parseObject(String, ParsePosition)`

### setContext

    public void setContext (DisplayContext context)

[icu] Set a particular DisplayContext value in the formatter, such as CAPITALIZATION_FOR_STANDALONE.

Parameters
`context` | `DisplayContext`: The DisplayContext value to set.

### setCurrency

    public void setCurrency (Currency theCurrency)

Sets the `Currency` object used to display currency amounts. This takes effect immediately, if this format is a currency format. If this format is not a currency format, then the currency object is used if and when this object becomes a currency format.

Parameters
`theCurrency` | `Currency`: new currency object to use. May be null for some subclasses.

### setGroupingUsed

    public void setGroupingUsed (boolean newValue)

Sets whether or not grouping will be used in this format. Grouping affects both parsing and formatting.

Parameters
`newValue` | `boolean`: true to use grouping.

See also:

- `isGroupingUsed()`

### setMaximumFractionDigits

    public void setMaximumFractionDigits (int newValue)

Sets the maximum number of digits allowed in the fraction portion of a number. This must be >= minimumFractionDigits. If the new value for maximumFractionDigits is less than the current value of minimumFractionDigits, then minimumFractionDigits will also be set to the new value.

Parameters
`newValue` | `int`: the maximum number of fraction digits to be shown; if less than zero, then zero is used. The concrete subclass may enforce an upper limit to this value appropriate to the numeric type being formatted.

See also:

- `getMaximumFractionDigits()`

### setMaximumIntegerDigits

    public void setMaximumIntegerDigits (int newValue)

Sets the maximum number of digits allowed in the integer portion of a number. This must be >= minimumIntegerDigits. If the new value for maximumIntegerDigits is less than the current value of minimumIntegerDigits, then minimumIntegerDigits will also be set to the new value.

Parameters
`newValue` | `int`: the maximum number of integer digits to be shown; if less than zero, then zero is used. Subclasses might enforce an upper limit to this value appropriate to the numeric type being formatted.

See also:

- `getMaximumIntegerDigits()`

### setMinimumFractionDigits

    public void setMinimumFractionDigits (int newValue)

Sets the minimum number of digits allowed in the fraction portion of a number. This must be <= maximumFractionDigits. If the new value for minimumFractionDigits exceeds the current value of maximumFractionDigits, then maximumFractionDigits will also be set to the new value.

Parameters
`newValue` | `int`: the minimum number of fraction digits to be shown; if less than zero, then zero is used. Subclasses might enforce an upper limit to this value appropriate to the numeric type being formatted.

See also:

- `getMinimumFractionDigits()`

### setMinimumIntegerDigits

    public void setMinimumIntegerDigits (int newValue)

Sets the minimum number of digits allowed in the integer portion of a number. This must be <= maximumIntegerDigits. If the new value for minimumIntegerDigits is more than the current value of maximumIntegerDigits, then maximumIntegerDigits will also be set to the new value.

Parameters
`newValue` | `int`: the minimum number of integer digits to be shown; if less than zero, then zero is used. Subclasses might enforce an upper limit to this value appropriate to the numeric type being formatted.

See also:

- `getMinimumIntegerDigits()`

### setParseIntegerOnly

    public void setParseIntegerOnly (boolean value)

Sets whether to ignore the fraction part of a number when parsing (defaults to false). If a string contains a decimal point, parsing will stop before the decimal point. Note that determining whether a character is a decimal point depends on the locale.

For example, in en-US, parsing the string "123.45" will return the number 123 and parse position 3.

Parameters
`value` | `boolean`: true if this should parse integers only

See also:

- `isParseIntegerOnly()`

### setParseStrict

    public void setParseStrict (boolean value)

[icu] Sets whether strict parsing is in effect. When this is true, the string is required to be a stronger match to the pattern than when lenient parsing is in effect. More specifically, the following conditions cause a parse failure relative to lenient mode (examples use the pattern "#,##0.#"):

- The presence and position of special symbols, including currency, must match the pattern.
  '+123' fails (there is no plus sign in the pattern)
- Leading or doubled grouping separators
  ',123' and '1,,234" fail
- Groups of incorrect length when grouping is used
  '1,23' and '1234,567' fail, but '1234' passes
- Grouping separators used in numbers followed by exponents
  '1,234E5' fails, but '1234E5' and '1,234E' pass ('E' is not an exponent when not followed by a number)

When strict parsing is off, all grouping separators are ignored. This is the default behavior.

Parameters
`value` | `boolean`: True to enable strict parsing. Default is false.

See also:

- `isParseStrict()`

### setRoundingMode

    public void setRoundingMode (int roundingMode)

Set the rounding mode used in this NumberFormat. The default implementation of tis method in NumberFormat always throws `UnsupportedOperationException`.

Parameters
`roundingMode` | `int`: A rounding mode, between `BigDecimal.ROUND_UP` and `BigDecimal.ROUND_UNNECESSARY`.

See also:

- `getRoundingMode()`

## Protected methods

### getPattern

    protected static String getPattern (ULocale forLocale,
                    int choice)

Returns the pattern for the provided locale and choice.

Parameters
`forLocale` | `ULocale`: the locale of the data.
`choice` | `int`: the pattern format.

Returns
`String` | the pattern

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